| 8101 | RRRR | Rock & Rail, Inc. | | USA | TRAFFIC |
| 8102 | RRRS | ROCK REMOVAL RESOURCES TRANSPORT LL | | | SCAC4 |
| 8103 | RRRT | RAVAGNIE, RAYMOND R TRUCKING | | | SCAC3 |
| 8104 | RRRT | R R R LOGISTICS LLC | | | SCAC4 |
| 8105 | RRRU | REBLOCK CONTAINER AS. | | N | BIC |
| 8106 | RRRU | R-CONTAINER IMPORT AS | | | SCAC4 |
| 8107 | RRRX | Rex Leasing, Inc. | added 1/1993; 1/1994-7/2005 | | NAKINA |
| 8108 | RRRX | General Electric Railcar Services Corp. | added 10/1992; eliminated 1/1993 | | NAKINA |
| 8109 | RRRX | Itel Rail Corp. | eliminated 10/1992 | | NAKINA |
| 8110 | RRRX | Rex Leasing, Inc. (transferred to Itel Rail Corp.) | added 10/1988 | | NAKINA |
| 8111 | RRRX | Rex Leasing, Inc. | added 7/1980; eliminated 1/1987; added 7/1987; eliminated 10/1988 | | NAKINA |
| 8112 | RRRX | Red River Refining Co., Inc. | 8/1920-7/1923 | | NAKINA |
| 8113 | RRRX | Rex Leasing, Inc. | added 7/80; eliminated 1/87; added 7/87; eliminated 10/88 | | NRHS |
| 8114 | RRRX | Rex Leasing, Inc. (transferred to Itel Rail Corp.) | added 10/88 | | NRHS |
| 8115 | RRRX | Itel Rail Corp. | eliminated 10/92 | | NRHS |
| 8116 | RRRX | General Electric Railcar Services Corp. | added 10/92; eliminated 1/93 | | NRHS |
| 8117 | RRRX | Rex Leasing, Inc. | added 1/93; 1/94-7/2000 | | NRHS |
| 8118 | RRRX | *RED RIVER REFINING CO., INC. | | | PWRC |
| 8119 | RRRX | +REX LEASING, INC. [GENERAL ELECTRIC RAILCAR SERVICES CORP.; ITEL RAIL CORP.] | | | PWRC |
| 8120 | RRRX | Rex Leasing | | | RSRV |
| 8121 | RRRX | REX LEASING, INC. | | | SCAC4 |
| 8122 | RRS | Boscombe Down DERA (Formation) | Callsign: Blackbox, Name changed from Boscombe Down DTEO (Formation) | GB | AVCODES |
| 8123 | RRS | Boscombe Down DTEO (Formation) | Callsign: Blackbox, Name changed to Boscombe Down DERA (Formation). Name changed from RAE Bedford (RRS) | GB | AVCODES |
| 8124 | RRS | RAE Bedford (RRS) | Callsign: Blackbox, Name changed to Boscombe Down DTEO (Formation) | GB | AVCODES |
| 8125 | RRS | Boscombe Down DERA (Formation) | | | ICAO1 |
| 8126 | RRS | RIMROCK STAGES | | | SCAC4 |
| 8127 | RRSA | RED RIVER SPRAY-ON LTD | | | SCAC4 |
| 8128 | RRSB | ROCKY RIDGE STABLES | | | SCAC4 |
| 8129 | RRSI | RED RIVER SUPPLY INC | | | SCAC4 |
| 8130 | RRSK | ROADRUNNER 66 TRUCKING INC | | | SCAC4 |
| 8131 | RRSK | Regio Rail, s.r.o. | | SK | VKM |
| 8132 | RRSL | RAJA ROADRAIL SERVICES LTD | | | SCAC4 |
| 8133 | RRSO | RECYCLING RESOURCES | | | SCAC3 |
| 8134 | RRSQ | REX, ROGER & SON TRUCKING INC | | | SCAC4 |
| 8135 | RRSR | RRR EXPRESS | | | SCAC4 |
| 8136 | RRSS | REED, R S & SONS INC | | | SCAC3 |
| 8137 | RRST | RRS TRANSPORT INC | | | SCAC3 |
| 8138 | RRST | RND RUSTICS | | | SCAC4 |
| 8139 | RRSU | ARCTIC REEFER SERVICE & REPAIR B.V | | NL | BIC |
| 8140 | RRSU | ARCTIC REEFER SERVICE & REPAIR B V | | | SCAC4 |
| 8141 | RRSW | ROAD RUNNER SPECIALTY TOWING & TRAN | | | SCAC4 |
| 8142 | RRT | Transportes Aereos Sierra Alta. S.A. de C.V. | Callsign: Sierra Alta, | MEX | AVCODES |
| 8143 | RRT | Transportes Aereos Sierra | | | ICAO1 |
| 8144 | RRTA | R & R TRANSPORTATION | | | SCAC3 |
| 8145 | RRTA | ROAD RUNNER TRAILER MANUFACTURING L | | | SCAC4 |
| 8146 | RRTB | R & R TRUCKING | | | SCAC3 |
| 8147 | RRTC | RED RIVER TRUCKING COMPANY | | | SCAC3 |
| 8148 | RRTD | R & R TRUCKING | | | SCAC3 |
| 8149 | RRTE | R & R TRUCKING (HUMBERSTONE) LIMITE | | | SCAC3 |
| 8150 | RRTE | R & R TRANSPORTATION | | | SCAC4 |
| 8151 | RRTG | REEDER, ROBERT TRUCKING | | | SCAC3 |
| 8152 | RRTH | R & R TRUCKING | | | SCAC3 |
| 8153 | RRTH | REDRICK TECHNOLOGIES INC | | | SCAC4 |
| 8154 | RRTI | R & R TRUCKING INC | | | SCAC3 |
| 8155 | RRTI | R & R TRANSPORT INC | | | SCAC4 |
| 8156 | RRTJ | RRT LOGISTICS INC | | | SCAC4 |
| 8157 | RRTL | ROLLAND ROSE TRUCKING INC | | | SCAC4 |
| 8158 | RRTM | R & R TRUCKING INC | | | SCAC3 |
| 8159 | RRTN | RED RIVER TRANSPORTATION | | | SCAC3 |
| 8160 | RRTO | RODRIGUEZ TRANSPORT | | | SCAC4 |
| 8161 | RRTP | ROAD-RAIL TRANSPORTATION COMPANY | | | SCAC3 |
| 8162 | RRTQ | ROADRUNNER TRUCKING, INC | | | SCAC3 |
| 8163 | RRTQ | R & R TRUCKING | | | SCAC4 |
| 8164 | RRTS | R & R TRUCKING SERVICE | | | SCAC3 |
| 8165 | RRTT | R & R TRANSPORTATION COMPANY | | | SCAC3 |
| 8166 | RRTV | R & R TRUCKING | | | SCAC3 |
| 8167 | RRTX | *(TTX) UMLER TEST ROAD NO.14 | | | PWRC |
| 8168 | RRTX | +RAILROAD TECHNOLOGY CORP. | | | PWRC |
| 8169 | RRTX | RAILROAD TECHNOLOGY CORPORATION | | | SCAC4 |
| 8170 | RRTY | R & R TRANSFER | | | SCAC3 |
| 8171 | RRTY | ROBERTSONS TRANSPORT | | | SCAC4 |
| 8172 | RRU | Cirrus, S.A. | Callsign: Helicirrus, | RCH | AVCODES |
| 8173 | RRU | Cirrus | | | ICAO1 |
| 8174 | RRUC | R & R TRUCKING INC (LOGISTICS DIVIS | | | SCAC4 |
| 8175 | RRUK | R AND R TRUCKING INC. | | | SCAC3 |
| 8176 | RRUK | R & R TRUCKING INC | | | SCAC4 |
| 8177 | RRUN | ROAD RUNNER TRAVEL & TOURS | | | SCAC3 |
| 8178 | RRV | Mombasa Air Safari Ltd. | Callsign: Skyrover, | EAK | AVCODES |
| 8179 | RRV | Mombasa Air Safari | | | ICAO1 |
| 8180 | RRVD | RIVER RIDGE LOGISTICS LLC | | | SCAC4 |
| 8181 | RRVI | RED RIVER INTERNATIONAL LLC | | | SCAC4 |
| 8182 | RRVL | REYNALDO RIVERA-SCULPTOR INC | | | SCAC4 |
| 8183 | RRVM | RAMOS RIVERA, MAURICIO | | | SCAC4 |
| 8184 | RRVN | ROAD RUNNER VAN LINES INC | | | SCAC4 |
| 8185 | RRVR | ROBERTS RIVER RIDES INC | | | SCAC3 |
| 8186 | RRVR | RED RIVER HOLDINGS LLC | | | SCAC4 |
| 8187 | RRVT | ROOT RIVER VALLEY TRANSFER, INC | | | SCAC3 |
| 8188 | RRVT | ROOT RIVER VALLEY TRANSFER INC | | | SCAC4 |
| 8189 | RRVW | Red River Valley and Western R.R. | added 1/1988; 1/1994-7/2005 | | NAKINA |
| 8190 | RRVW | Red River Valley and Western R.R. | added 1/88; 1/94-7/2000 | | NRHS |
| 8191 | RRVW | RED RIVER VALLEY & WESTERN RAILROAD CO. | | | PWRC |
| 8192 | RRVW | Red River Valley and Western Railroad | | | RSRV |
| 8193 | RRVW | RED RIVER VALLEY & WESTERN RAILROAD | | | SCAC3 |
| 8194 | RRVW | RED RIVER VALLEY & WESTERN RAILROAD | | | SCAC4 |
| 8195 | RRWA | RUN-R-WAY EXPRESS CO INC | | | SCAC3 |
| 8196 | RRWA | RUN-R-WAY EXPRESS CO INC | | | SCAC4 |
| 8197 | RRWL | REEVAS RITINGS WITH RUACH LLC | | | SCAC4 |
| 8198 | RRWO | RENFROWS TRUCKING INC | | | SCAC4 |
| 8199 | RRWR | RADOVICH, R W TRANSPORT INC | | | SCAC4 |
| 8200 | RRWT | RED ARROW TRUCKING | | | SCAC3 |
